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545 lines
20 KiB
JavaScript
545 lines
20 KiB
JavaScript
/**
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* @licstart The following is the entire license notice for the
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* Javascript code in this page
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*
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* Copyright 2019 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* Javascript code in this page
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*/
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.FontLoader = exports.FontFaceObject = void 0;
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var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator"));
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var _util = require("../shared/util");
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
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function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
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function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
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function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
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function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
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function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
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function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
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function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }
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function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
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function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
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var BaseFontLoader =
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/*#__PURE__*/
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function () {
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function BaseFontLoader(_ref) {
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var docId = _ref.docId,
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onUnsupportedFeature = _ref.onUnsupportedFeature;
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_classCallCheck(this, BaseFontLoader);
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if (this.constructor === BaseFontLoader) {
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(0, _util.unreachable)('Cannot initialize BaseFontLoader.');
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}
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this.docId = docId;
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this._onUnsupportedFeature = onUnsupportedFeature;
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this.nativeFontFaces = [];
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this.styleElement = null;
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}
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_createClass(BaseFontLoader, [{
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key: "addNativeFontFace",
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value: function addNativeFontFace(nativeFontFace) {
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this.nativeFontFaces.push(nativeFontFace);
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document.fonts.add(nativeFontFace);
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}
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}, {
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key: "insertRule",
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value: function insertRule(rule) {
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var styleElement = this.styleElement;
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if (!styleElement) {
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styleElement = this.styleElement = document.createElement('style');
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styleElement.id = "PDFJS_FONT_STYLE_TAG_".concat(this.docId);
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document.documentElement.getElementsByTagName('head')[0].appendChild(styleElement);
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}
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var styleSheet = styleElement.sheet;
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styleSheet.insertRule(rule, styleSheet.cssRules.length);
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}
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}, {
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key: "clear",
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value: function clear() {
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this.nativeFontFaces.forEach(function (nativeFontFace) {
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document.fonts["delete"](nativeFontFace);
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});
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this.nativeFontFaces.length = 0;
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if (this.styleElement) {
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this.styleElement.remove();
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this.styleElement = null;
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}
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}
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}, {
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key: "bind",
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value: function () {
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var _bind = _asyncToGenerator(
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/*#__PURE__*/
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_regenerator["default"].mark(function _callee(font) {
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var _this = this;
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var nativeFontFace, rule;
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return _regenerator["default"].wrap(function _callee$(_context) {
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while (1) {
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switch (_context.prev = _context.next) {
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case 0:
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if (!(font.attached || font.missingFile)) {
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_context.next = 2;
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break;
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}
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return _context.abrupt("return", undefined);
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case 2:
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font.attached = true;
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if (!this.isFontLoadingAPISupported) {
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_context.next = 19;
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break;
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}
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nativeFontFace = font.createNativeFontFace();
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if (!nativeFontFace) {
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_context.next = 18;
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break;
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}
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this.addNativeFontFace(nativeFontFace);
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_context.prev = 7;
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_context.next = 10;
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return nativeFontFace.loaded;
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case 10:
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_context.next = 18;
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break;
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case 12:
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_context.prev = 12;
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_context.t0 = _context["catch"](7);
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this._onUnsupportedFeature({
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featureId: _util.UNSUPPORTED_FEATURES.font
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});
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(0, _util.warn)("Failed to load font '".concat(nativeFontFace.family, "': '").concat(_context.t0, "'."));
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font.disableFontFace = true;
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throw _context.t0;
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case 18:
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return _context.abrupt("return", undefined);
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case 19:
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rule = font.createFontFaceRule();
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if (!rule) {
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_context.next = 25;
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break;
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}
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this.insertRule(rule);
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if (!this.isSyncFontLoadingSupported) {
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_context.next = 24;
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break;
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}
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return _context.abrupt("return", undefined);
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case 24:
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return _context.abrupt("return", new Promise(function (resolve) {
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var request = _this._queueLoadingCallback(resolve);
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_this._prepareFontLoadEvent([rule], [font], request);
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}));
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case 25:
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return _context.abrupt("return", undefined);
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case 26:
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case "end":
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return _context.stop();
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}
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}
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}, _callee, this, [[7, 12]]);
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}));
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function bind(_x) {
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return _bind.apply(this, arguments);
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}
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return bind;
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}()
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}, {
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key: "_queueLoadingCallback",
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value: function _queueLoadingCallback(callback) {
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(0, _util.unreachable)('Abstract method `_queueLoadingCallback`.');
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}
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}, {
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key: "_prepareFontLoadEvent",
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value: function _prepareFontLoadEvent(rules, fontsToLoad, request) {
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(0, _util.unreachable)('Abstract method `_prepareFontLoadEvent`.');
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}
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}, {
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key: "isFontLoadingAPISupported",
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get: function get() {
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(0, _util.unreachable)('Abstract method `isFontLoadingAPISupported`.');
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}
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}, {
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key: "isSyncFontLoadingSupported",
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get: function get() {
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(0, _util.unreachable)('Abstract method `isSyncFontLoadingSupported`.');
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}
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}, {
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key: "_loadTestFont",
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get: function get() {
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(0, _util.unreachable)('Abstract method `_loadTestFont`.');
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}
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}]);
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return BaseFontLoader;
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}();
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var FontLoader;
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exports.FontLoader = FontLoader;
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{
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exports.FontLoader = FontLoader =
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/*#__PURE__*/
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function (_BaseFontLoader) {
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_inherits(GenericFontLoader, _BaseFontLoader);
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function GenericFontLoader(docId) {
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var _this2;
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_classCallCheck(this, GenericFontLoader);
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_this2 = _possibleConstructorReturn(this, _getPrototypeOf(GenericFontLoader).call(this, docId));
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_this2.loadingContext = {
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requests: [],
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nextRequestId: 0
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};
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_this2.loadTestFontId = 0;
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return _this2;
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}
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_createClass(GenericFontLoader, [{
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key: "_queueLoadingCallback",
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value: function _queueLoadingCallback(callback) {
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function completeRequest() {
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(0, _util.assert)(!request.done, 'completeRequest() cannot be called twice.');
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request.done = true;
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while (context.requests.length > 0 && context.requests[0].done) {
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var otherRequest = context.requests.shift();
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setTimeout(otherRequest.callback, 0);
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}
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}
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var context = this.loadingContext;
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var request = {
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id: "pdfjs-font-loading-".concat(context.nextRequestId++),
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done: false,
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complete: completeRequest,
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callback: callback
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};
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context.requests.push(request);
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return request;
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}
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}, {
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key: "_prepareFontLoadEvent",
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value: function _prepareFontLoadEvent(rules, fonts, request) {
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function int32(data, offset) {
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return data.charCodeAt(offset) << 24 | data.charCodeAt(offset + 1) << 16 | data.charCodeAt(offset + 2) << 8 | data.charCodeAt(offset + 3) & 0xff;
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}
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function spliceString(s, offset, remove, insert) {
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var chunk1 = s.substring(0, offset);
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var chunk2 = s.substring(offset + remove);
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return chunk1 + insert + chunk2;
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}
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var i, ii;
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var canvas = document.createElement('canvas');
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canvas.width = 1;
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canvas.height = 1;
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var ctx = canvas.getContext('2d');
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var called = 0;
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function isFontReady(name, callback) {
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called++;
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if (called > 30) {
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(0, _util.warn)('Load test font never loaded.');
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callback();
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return;
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}
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ctx.font = '30px ' + name;
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ctx.fillText('.', 0, 20);
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var imageData = ctx.getImageData(0, 0, 1, 1);
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if (imageData.data[3] > 0) {
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callback();
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return;
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}
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setTimeout(isFontReady.bind(null, name, callback));
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}
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var loadTestFontId = "lt".concat(Date.now()).concat(this.loadTestFontId++);
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var data = this._loadTestFont;
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var COMMENT_OFFSET = 976;
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data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length, loadTestFontId);
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var CFF_CHECKSUM_OFFSET = 16;
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var XXXX_VALUE = 0x58585858;
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var checksum = int32(data, CFF_CHECKSUM_OFFSET);
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for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {
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checksum = checksum - XXXX_VALUE + int32(loadTestFontId, i) | 0;
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}
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if (i < loadTestFontId.length) {
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checksum = checksum - XXXX_VALUE + int32(loadTestFontId + 'XXX', i) | 0;
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}
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data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, (0, _util.string32)(checksum));
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var url = "url(data:font/opentype;base64,".concat(btoa(data), ");");
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var rule = "@font-face {font-family:\"".concat(loadTestFontId, "\";src:").concat(url, "}");
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this.insertRule(rule);
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var names = [];
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for (i = 0, ii = fonts.length; i < ii; i++) {
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names.push(fonts[i].loadedName);
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}
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names.push(loadTestFontId);
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var div = document.createElement('div');
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div.setAttribute('style', 'visibility: hidden;' + 'width: 10px; height: 10px;' + 'position: absolute; top: 0px; left: 0px;');
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for (i = 0, ii = names.length; i < ii; ++i) {
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var span = document.createElement('span');
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span.textContent = 'Hi';
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span.style.fontFamily = names[i];
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div.appendChild(span);
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}
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document.body.appendChild(div);
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isFontReady(loadTestFontId, function () {
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document.body.removeChild(div);
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request.complete();
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});
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}
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}, {
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key: "isFontLoadingAPISupported",
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get: function get() {
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var supported = typeof document !== 'undefined' && !!document.fonts;
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if (supported && typeof navigator !== 'undefined') {
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var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(navigator.userAgent);
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if (m && m[1] < 63) {
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supported = false;
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}
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}
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return (0, _util.shadow)(this, 'isFontLoadingAPISupported', supported);
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}
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}, {
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key: "isSyncFontLoadingSupported",
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get: function get() {
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var supported = false;
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if (typeof navigator === 'undefined') {
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supported = true;
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} else {
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var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(navigator.userAgent);
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if (m && m[1] >= 14) {
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supported = true;
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}
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}
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return (0, _util.shadow)(this, 'isSyncFontLoadingSupported', supported);
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}
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}, {
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key: "_loadTestFont",
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get: function get() {
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var getLoadTestFont = function getLoadTestFont() {
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return atob('T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQA' + 'FQAABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAA' + 'ALwAAAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgA' + 'AAAGbmFtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1' + 'AAsD6AAAAADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD' + '6AAAAAAD6AABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACM' + 'AooCvAAAAeAAMQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4D' + 'IP84AFoDIQAAAAAAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAA' + 'AAEAAQAAAAEAAAAAAAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUA' + 'AQAAAAEAAAAAAAYAAQAAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgAB' + 'AAMAAQQJAAMAAgABAAMAAQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABY' + 'AAAAAAAAAwAAAAMAAAAcAAEAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAA' + 'AC7////TAAEAAAAAAAABBgAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + 'AAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAAAAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAA' + 'AAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgcA/gXBIwMAYuL+nz5tQXkD5j3CBLnEQAC' + 'AQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYAAABAQAADwACAQEEE/t3' + 'Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQAAAAAAAABAAAAAMmJbzEAAAAAzgTj' + 'FQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAgABAAAAAAAAAAAD6AAAAAAAAA==');
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};
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return (0, _util.shadow)(this, '_loadTestFont', getLoadTestFont());
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}
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}]);
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return GenericFontLoader;
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}(BaseFontLoader);
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}
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var IsEvalSupportedCached = {
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get value() {
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return (0, _util.shadow)(this, 'value', (0, _util.isEvalSupported)());
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}
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};
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var FontFaceObject =
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/*#__PURE__*/
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function () {
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function FontFaceObject(translatedData, _ref2) {
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var _ref2$isEvalSupported = _ref2.isEvalSupported,
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isEvalSupported = _ref2$isEvalSupported === void 0 ? true : _ref2$isEvalSupported,
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_ref2$disableFontFace = _ref2.disableFontFace,
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disableFontFace = _ref2$disableFontFace === void 0 ? false : _ref2$disableFontFace,
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_ref2$ignoreErrors = _ref2.ignoreErrors,
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ignoreErrors = _ref2$ignoreErrors === void 0 ? false : _ref2$ignoreErrors,
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_ref2$onUnsupportedFe = _ref2.onUnsupportedFeature,
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onUnsupportedFeature = _ref2$onUnsupportedFe === void 0 ? null : _ref2$onUnsupportedFe,
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_ref2$fontRegistry = _ref2.fontRegistry,
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fontRegistry = _ref2$fontRegistry === void 0 ? null : _ref2$fontRegistry;
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_classCallCheck(this, FontFaceObject);
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this.compiledGlyphs = Object.create(null);
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for (var i in translatedData) {
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this[i] = translatedData[i];
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}
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this.isEvalSupported = isEvalSupported !== false;
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this.disableFontFace = disableFontFace === true;
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this.ignoreErrors = ignoreErrors === true;
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this._onUnsupportedFeature = onUnsupportedFeature;
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this.fontRegistry = fontRegistry;
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}
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_createClass(FontFaceObject, [{
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key: "createNativeFontFace",
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value: function createNativeFontFace() {
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if (!this.data || this.disableFontFace) {
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return null;
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}
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var nativeFontFace = new FontFace(this.loadedName, this.data, {});
|
|
|
|
if (this.fontRegistry) {
|
|
this.fontRegistry.registerFont(this);
|
|
}
|
|
|
|
return nativeFontFace;
|
|
}
|
|
}, {
|
|
key: "createFontFaceRule",
|
|
value: function createFontFaceRule() {
|
|
if (!this.data || this.disableFontFace) {
|
|
return null;
|
|
}
|
|
|
|
var data = (0, _util.bytesToString)(new Uint8Array(this.data));
|
|
var url = "url(data:".concat(this.mimetype, ";base64,").concat(btoa(data), ");");
|
|
var rule = "@font-face {font-family:\"".concat(this.loadedName, "\";src:").concat(url, "}");
|
|
|
|
if (this.fontRegistry) {
|
|
this.fontRegistry.registerFont(this, url);
|
|
}
|
|
|
|
return rule;
|
|
}
|
|
}, {
|
|
key: "getPathGenerator",
|
|
value: function getPathGenerator(objs, character) {
|
|
if (this.compiledGlyphs[character] !== undefined) {
|
|
return this.compiledGlyphs[character];
|
|
}
|
|
|
|
var cmds, current;
|
|
|
|
try {
|
|
cmds = objs.get(this.loadedName + '_path_' + character);
|
|
} catch (ex) {
|
|
if (!this.ignoreErrors) {
|
|
throw ex;
|
|
}
|
|
|
|
if (this._onUnsupportedFeature) {
|
|
this._onUnsupportedFeature({
|
|
featureId: _util.UNSUPPORTED_FEATURES.font
|
|
});
|
|
}
|
|
|
|
(0, _util.warn)("getPathGenerator - ignoring character: \"".concat(ex, "\"."));
|
|
return this.compiledGlyphs[character] = function (c, size) {};
|
|
}
|
|
|
|
if (this.isEvalSupported && IsEvalSupportedCached.value) {
|
|
var args,
|
|
js = '';
|
|
|
|
for (var i = 0, ii = cmds.length; i < ii; i++) {
|
|
current = cmds[i];
|
|
|
|
if (current.args !== undefined) {
|
|
args = current.args.join(',');
|
|
} else {
|
|
args = '';
|
|
}
|
|
|
|
js += 'c.' + current.cmd + '(' + args + ');\n';
|
|
}
|
|
|
|
return this.compiledGlyphs[character] = new Function('c', 'size', js);
|
|
}
|
|
|
|
return this.compiledGlyphs[character] = function (c, size) {
|
|
for (var _i = 0, _ii = cmds.length; _i < _ii; _i++) {
|
|
current = cmds[_i];
|
|
|
|
if (current.cmd === 'scale') {
|
|
current.args = [size, -size];
|
|
}
|
|
|
|
c[current.cmd].apply(c, current.args);
|
|
}
|
|
};
|
|
}
|
|
}]);
|
|
|
|
return FontFaceObject;
|
|
}();
|
|
|
|
exports.FontFaceObject = FontFaceObject; |